// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// For manipulting of received data

// 

//

/**

 @file schat.cpp 

*/

#include "SCHAT.H"

#include "ND_STD.H"

//

// CCommChatter definitions

//

CCommChatter* CCommChatter::NewL(MCommChatNotify* aNotify,TInt aPriority,TInt aBufferSize)

/**

2 phased constructor for CCommChatter, first phase.

@param aNotify a pointer to chat notifier.

@param aPriority is priority for this timer.

@param aBufferSize is buffer size for this object.

@exception Leaves if ConstructL() leaves, or not enough memory is available.

@return a new CCommChatter object.

*/

	{

	CCommChatter* cc=new(ELeave) CCommChatter(aNotify,aPriority);

	CleanupStack::PushL(cc);

	cc->ConstructL(aBufferSize);

	CleanupStack::Pop();

	return cc;

	}

CCommChatter::CCommChatter(MCommChatNotify* aNotify, TInt aPriority)

	: CTimer(aPriority), iNotify(aNotify)

/**

Private constructor for CCommChatter, used in the first phase of construction.

@param aNotify a pointer to chat notifier.

@param aPriority is priority for this timer.

*/

	{

	CActiveScheduler::Add(this);

	iList.SetOffset(_FOFF(CCommChatString,iLink));

	}

void CCommChatter::ConstructL(TInt aBufSize)

/**

Instantiates member variables.

@param aBufSize is buffer size for this object.

@exception Leaves if CTimer::ConstructL() or User::AllocL() leaves.

*/

	{

	CTimer::ConstructL();

	iBuffer=(TText8*)User::AllocL(aBufSize);

	iBufferEnd=(iBuffer+aBufSize)-1;

	ClearHistory();

	}

CCommChatter::~CCommChatter()

/**

Destructor.

Frees iBuffer's allocated memory.

*/

	{

	User::Free(iBuffer);

	}

void CCommChatter::ClearHistory()

/**

Empties history.

*/

	{

	iLastChar=iBuffer;

	iCount=0;

	}

void CCommChatter::AddChar(TText8 aChar)

/**

Adds a character to the history buffer.

Scan all strings to find any matches that may be completed.

*/

	{

	if (++iLastChar>iBufferEnd)

		iLastChar=iBuffer;

	*iLastChar=aChar;

	++iCount;

	TText8 fchar=(TText8)User::Fold(aChar);

	// Scan for matching last character	

	CCommChatString* cs;

	TDblQueIter<CCommChatString> iter(iList);

	TInt index=0;

	while (cs=iter++, cs!=NULL)

		{

		if (cs->IsFolded()

			? (cs->LastChar()==fchar && MatchF(cs))

			: (cs->LastChar()==aChar && Match(cs)) )

			{

			iNotify->ChatStringMatch(index);

			cs=iter;	// In case user removed cs;

			}

		index++;

		}

	}

TBool CCommChatter::Match(const CCommChatString* aString) const

/**

Matches a chat string against the history buffer (Case sensitive).

*/

	{

	__ASSERT_ALWAYS(aString!=NULL, NetDialPanic(ENullCommChatString));

	const TText8* s=aString->Ptr();

	const TText8* sp=aString->EndPtr();

	const TText8* bp=iLastChar;

	if (iCount<aString->Length())

		return EFalse;

	while (*bp==*sp && sp>=s)

		{

		--sp;

		if (--bp<iBuffer)

			bp=iBufferEnd;

		}

	return sp<s;

	}

TBool CCommChatter::MatchF(const CCommChatString* aString) const

/**

Matches a folded chat string against the history buffer (Case insensitive).

*/

	{

	__ASSERT_ALWAYS(aString!=NULL, NetDialPanic(ENullCommChatString));

	const TText8* s=aString->Ptr();

	const TText8* sp=aString->EndPtr();

	const TText8* bp=iLastChar;

	if (iCount<aString->Length())

		return EFalse;

	while (User::Fold(*bp)==*sp && sp>=s)

		{

		--sp;

		if (--bp<iBuffer)

			bp=iBufferEnd;

		}

	return sp<s;

	}

void CCommChatter::RunL()

/**

Timer completed.

*/

	{

	iNotify->ChatTimeout();

	}

void CCommChatter::AddString(CCommChatString* aString)

/**

Adds a string to the list.

*/

	{

	__ASSERT_ALWAYS(aString!=NULL, NetDialPanic(ENullCommChatString));

	iList.AddLast(*aString);

	}

void CCommChatter::RemoveString(CCommChatString* aString)

/**

Removes a string from the list.

*/

	{

	__ASSERT_ALWAYS(aString!=NULL, NetDialPanic(ENullCommChatString));

	aString->iLink.Deque();

	}

void CCommChatter::DeleteAllAndStop()

/**

Removes all strings from the list.

*/

	{

	StopTimer();

	CCommChatString* cs;

	while (!iList.IsEmpty())

		{

		cs=iList.First();

		RemoveString(cs);

		delete cs;

		}

	}

void CCommChatter::StartTimer(const TTimeIntervalMicroSeconds32& aTimeout)

/**

Starts timer.

*/

	{

	if (IsActive())

		Cancel();

	After(aTimeout);

	}

void CCommChatter::StopTimer()

/**

Stops timer.

*/

	{

	Cancel();

	}

//

// CCommChatString definitions

//

CCommChatString* CCommChatString::NewL(const TDesC8& aDes,TBool aIsFolded)

/**

2 phased constructor for CCommChatString, first phase.

@param aDes a pointer to chat notifier.

@param aIsFolded is buffer size for this object.

@exception Leaves if ConstructL() leaves, or not enough memory is available.

@return a new CCommChatString object.

*/

	{

	CCommChatString* cs=new (ELeave) CCommChatString;

	CleanupStack::PushL(cs);

	cs->ConstructL(aDes,aIsFolded);

	CleanupStack::Pop();

	return cs;

	}

CCommChatString::CCommChatString()

/**

Private constructor for CCommChatString, used in the first phase of construction.

*/

	{}

void CCommChatString::ConstructL(const TDesC8& aDes,TBool aIsFolded)

/**

Instantiates member variables.

*/

	{

	__ASSERT_ALWAYS(aDes.Length()>0, NetDialPanic(ENullCommChatString));

	iIsFolded=aIsFolded;

	iString=(TText8*)User::AllocL(aDes.Length());

	iLastChar=(iString+aDes.Length())-1;

	Mem::Copy(iString, (TText8*)aDes.Ptr(), aDes.Length());

	}

CCommChatString::~CCommChatString()

/**

Destructor.

Deletes allocations/objects.

*/

	{

	User::Free(iString);

	}